Yeah, pans and zooms are often done at 24fps while the cel animation is done at 12fps, so you may get a few frames where both fields are blended and can't be restored but, usually, at least one of the fields will have the animated parts without blending. If the blending is limited to the background on pans and zooms, it's usually not as noticeable. The biggest problem is the fact that you may only have one unblended field to work with for some of the frames, so that frame will take a hit in picture quality.